Which of the following can cause enzyme activity to either increase or decrease?
A) changing the temperature
B) changing the pH
C) both a and b
D) neither a nor b
C
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In the period between 1970 and 2017, 28 of the 40 worst disasters occurred in a belt running from Bangladesh through India and Iran to Turkey.
Answer the following statement true (T) or false (F)
Centripetal force does no work on a circularly-moving object because
A. it has no component of force in the direction of motion. B. of natural change in energy. C. rotational energy transfers to kinetic energy. D. none of the above.
Which main-sequence stars are the least massive?
A) yellow B) orange C) blue D) red
The principle of ________________ states that an igneous intrusion or a fault must be younger
than the rock it displaces. Fill in the blank(s) with the appropriate word(s).